Three speciments A,B,C of same radiactive element have activites, 1 curie 1 rutherford and 1 becquerel respectively. Which specimen has maximu mass:

Three specimens A, B, C of same radioactive element has activities 1 microcurie, 1 rutherford and 1 becquerel respectively. Which specimen has maximum mass?

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the same group ?

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the same group ?

The elements Li, B, C, Be and N have the electronegativities 1.0, 2.0, 1.5 and 3.0, respectively on the Pauling scale.

The elements A,B,C,D and E have atomic number 9,11,17,12 and 13 respectively. Which pair of elements belong to the same group?

The decay constant of a radioactive isotope is lambda . If A_1 and A_2 are its activites at time t_1 and t_2 respectively, then the number of nuclei which have decayed the time (t_1-t_2)

The decay constant of a radioactive isotope is lambda . If A_1 and A_2 are its activites at time t_1 and t_2 respectively, then the number of nuclei which have decayed the time (t_1-t_2)

Three bodies A,B and C have equal areas which are painted red, yellow and black respectively. If they are at same temperature then